Patent GB-190509536-A (GB)
Title: Improved Apparatus for the Production and Distribution of a Gaseous Mixture Serving for the Extinguishing of Fire and for Killing Insects and Microbes.
Inventor: MAROT RENE
Filed: 1905-05-05
Granted: 1906-05-03
Abstract: 9536. Marot, R. May 5. Gas engines, cooling cylinders and utilizing waste heat of. Relates to improvements in the apparatus, for producing and distributing a gaseous mixture of sulphurous anhydride and air serving for extinguishing fires and killing insects and microbes, described in Specification No. 14,372, A.D. 1904, [Abridgment Class Medicine &c.]. Liquid sulphurous anhydride stored in bottles escapes on opening cocks and passes through serpentine tubes a9, Fig. 3, heated by Bunsen burners a<2> fed with petrol. The gas passes into a collector a'‹ connected by tubes a<11> with another collector a<12> communicating by pipes a<13> with a chamber a<14> where it is mixed with a suitable proportion of air introduced through a damper a<15>, the gaseous mixture passing by a conduit m to the central space of the air cooler b, Fig. 5. The cooling-water of the motor working the apparatus circulates through an annular chamber b<1>, in which is coiled a helical pipe b<2>, connected at its lower end directly to one of the bottles containing liquid sulphur dioxide, which, on escaping, passes through the coil, cooling the water in the chamber. The pipe b<2> passes down the middle of the chamber b and terminates in a perforated nozzle, from which the gaseous sulphur dioxide issues, meeting the warmed mixture of sulphur dioxide and air entering by the conduit m. From the chamber b, the mixture passes to a cylindrical glass chamber j, Figs. 1 and 2, where it is subjected to the action of silent electric discharges and electric sparks passing thence through a conduit n to a fan or blower c, by which it is delivered through pipes to the places where required. A further quantity of air can be introduced through a damper s. The electrical supply is obtained from a dynamo h driven by the motor d, which also drives the fan c through a reducing train of wheels enclosed in a casing c'. Below the fan c is a space o fitted with three orifices, to which are adapted pipes when it is desired to re-aspirate the gaseous mixture, these orifices being normally closed by covers o', o<2>, o<3>. In the space o is arranged the radiator l composed of serpentine ribbed pipes, through which the cooling-water of the motor circulates when the re-aspirating action takes place, the water being cooled by the current of cold gas drawn in by the fan. The cooling-water of the motor d is drawn from a reservoir f through a pipe p by a pump operated by the motor and forced through a pipe p<1> fitted with a branch p<2> connected to a three-way cock q, by operating which the water can be sent directly through the pipes p<2> to the motor, then through a pipe p4 to the cooler b, and back to the reservoir by a pipe p<5>. This action takes place when the apparatus is being used to generate a mixture of air and sulphur dioxide. When the mixture, is being re-aspirated, the cock q is turned to close the-passage between the pipes p<2>, so that the water has first to pass through the pipe p<1>, radiator l, and pipe p<5>, then through the pipe p<2> &c. as'before.